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3 years ago

Solve the following equation algebraically: 3 x squared = 12

Mathematics

2 answers:

Inessa05 [86]3 years ago

7 0

X = 2 or -2

either way it’s still 12 , hope this helps !

BabaBlast [244]3 years ago

3 0

Answer: x = ± 2

Step-by-step explanation:

3x² = 12

x² = 12/3

x² = 4

x = √4

x = ± 2

Answer: x = ± 2

<h2><em>Spymore</em></h2>

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Answer:

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Step-by-step explanation:

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She noticed that after 18 minutes the temperature of the pie is 138°C

Putting T(t) =138°C and t= 18 minutes

$138=230 -Ae^{-k\times 18}$

$\Rightarrow -Ae^{-18k}=138-230$

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Again after 36 minutes it is 184°C

Putting T(t) =184°C and t= 36 minutes

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$\frac{Ae^{-36k}}{Ae^{-18k}}=\frac{46}{92}$

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$ln e^{-18k}=ln\frac{46}{92}$

$\Rightarrow -18k =ln (\frac12)$

$\Rightarrow -18k= ln1-ln2$

$\Rightarrow k= \frac{ln2 }{18}$

Putting the value k in equation (1)

$Ae^{-18\frac{ln2}{18}}=92$

$\Rightarrow A e^{ln2^{-1}}=92$

$\Rightarrow A.2^{-1}=92$

$\Rightarrow \frac{A}{2}=92$

$\Rightarrow A= 92 \times 2$

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